package com.net.io.netty.stickhalfpk.resolve.custom.delimiter;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

import java.util.concurrent.atomic.AtomicInteger;

/**
 * @author zhangtengfei
 * @date 2022/2/15 15:24
 */
@ChannelHandler.Sharable
public class DelimiterServerHandler extends ChannelInboundHandlerAdapter {

    private AtomicInteger counter = new AtomicInteger(0);

    /**
     * 服务端读取到网络数据后的处理
     */
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf in = (ByteBuf) msg;
        String request = in.toString(CharsetUtil.UTF_8);
        System.out.println("Server Accept[" + request + "] and the counter is:" + counter.incrementAndGet());
        String resp = "Hello," + request + ". Welcome to Netty World!" + DelimiterEchoServer.DELIMITER_SYMBOL;
        ctx.writeAndFlush(Unpooled.copiedBuffer(resp.getBytes()));
    }

    /**
     * 服务端读取完成网络数据后的处理
     */
    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        ctx.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
    }

    /**
     * 发生异常后的处理
     */
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}
